| Acronyms | Meaning / Significance |
Source |
| P | Protocol | |
| P (e/F) | Probability of an enemy being declared as friend | |
| P (f/F) | Probability of a friend being declared as friend | |
| P&I | Privleges and Immunities Section | |
| P&P | plan and policy division | NATO IMS |
| P&P | Precedence and Preemption | |
| P-T-P | Point-to-Point | |
| PA | Partly ACCs | |
| PA | Political Affairs division | NATO IS |
| PABX | private automatic branch exchange | STC TM-731 |
| PACE | packet sized crypto equipment | |
| PAD | Packet Assembler/Diassembler | |
| PAD | preliminary analysis document | |
| PAD | provisional acceptance date | |
| PADP | Panel on Air Defence Philosophy | |
| PADW | panel on air defence weapons | |
| PAGODA | profile allignment group for ODA | |
| PAH | Panzerabwehrhubschrauber | |
| PAIS | Prototype ACE Intelligence Software | |
| PAIS | prototype ACE intelligence system | Ex Strong Resolve 95 |
| PALS | precision approach and landing systems | |
| PAMCS | panel on the airspace management and control system | |
| PAO | public affairs office | |
| PAPS | Phased Armament Planning System | |
| PARP | (PfP) Planning and Review Process | |
| PAS | protected aircraft shelter | |
| PAS | protection of allied shipping | |
| PAS | publicly available standard | STC CSNI final report 22/9/95 |
| PASC | portable applications standards committee | |
| PAT | production acceptance test | |
| PB&Cs | Planning Boards & Committees | PPC,FAPC,IPC,CAPC,PBOS,CDC,CCPC... |
| PBEIST | Planning Board for European Inland Surface transport | |
| PBOS | Planning Board for Ocean Shipping | |
| PC | personal computer | |
| PC | Political Committee | |
| PC | Political Consultation | |
| PCB | Program Control Board | |
| PCC | partnership coordination cell | |
| PCC | Polygone Coordination Center | |
| PCCM | political consultation and crisis management | |
| PCI | Protocol Control Information | |
| PCIS | Portable Common Interface Set | |
| PCM | Package Coordination Meeting | |
| PCM | pulse code modulated | STC TM-731 |
| PCM | Pulse Code Modulation | |
| PCMCIA | personal computer memory card international association | |
| PCMP | Purchaser Coordination Master Plan | |
| PCN | private communications network | |
| PCNCEP | Political Consultation and NATO Civil Emergency Planning | |
| PCTE | portable common tools environment | |
| PCU | plan civil d'urgence | |
| PD | project definition | |
| PD | pulse doppler | |
| PD | pulse duration | |
| PDAD | Proposed Draft Addendum | |
| PDES | product data exchange using STEP | |
| PDISP | Proposed Draft International Standardized Profile | |
| PDN | Public Data Network | |
| PDNSP | Proposed Draft NATO Standardized Profile | |
| PDP | peripheral data processor | |
| PDS | Programm Development System | |
| PDS | project data sheet | CP |
| PDS | project design study | |
| PDTR | proposed draft technical report | |
| PDU | Protocol Data Unit | |
| PE | peacetime establishment | |
| PEB | Project Evaluation Board | |
| PET | Project Evaluation Team | |
| PEX | PHIGS extension to X-Windows | |
| PfP | Partners for Peace | |
| PfP | partnership for peace | |
| PG | Project-Group | |
| Ph | Physical | |
| PHARE | Programme for Harmonized Research in EUROCONTROL | |
| PHIGS | programmer's hierarchical interactive graphics system | |
| PhP | Physical Protocol | |
| PHQ | peace headquarters | NACISA USD 23.01.00(93)01 |
| PhS | Physical Service | |
| PIA | public information advisor | |
| PIC | public information committee | |
| PICS | Protocol Implementation Conformance Statement | |
| PID | Probability of Identification | |
| PIN | Personal Identification Number | |
| PIOC | Programmable I/O Controller | |
| PIP | project implementation plan | |
| PIWG | permanent interoperability working group | |
| PIXIT | Protocol Implementation Conformance Extra Information | |
| PKI | public key infrastructure | AC/317-N/846 |
| PKO | peace keeping operation | |
| PKS | Pixelkoordinatensystem | |
| PLCMB | Project Level Configuration Management Board | |
| PLP | Packet Level Protocol | |
| PLS | Physical Signalling | |
| PLSS | precision location strike system | |
| PLV | Posterior Likelihood Vector | |
| PM | Project Manager | |
| PMD | Physical Medium Dependent (Sublayer 1a FDDI) | |
| PME | Principal Mission Elements | |
| PMG | Program Management Group | |
| PMO | project management office | |
| PMP | programme management plan | |
| PMSAHG | AHG on cooperation in peace-keeping | |
| PMSC | political-military steering committee on PfP | |
| PMSTSG | PMSC technical sub-group | |
| PNP | Private Numbering Plan | |
| PO | participating organization | STC CSNI final report 22/9/95 |
| PO | Personnel Officer | |
| PO | private office | |
| PO | project officer | |
| POACCS | Portuguese air command and control system | |
| POB | policy and operations branch | |
| POC | point of contact | |
| PODICS | Portuguese defence integrated communication system | |
| POMCUS | prepositioning of organizational material configured in unit site | |
| POMSS | prepositioned organizational material set storage | |
| POP | point of presence | |
| POP | proof of principles | AC/4(WG29)DS/139 |
| POSI | Promoting Conference for OSI | |
| POSIX | portable OS interface (for computer environments) | |
| POTL | participating organization task leader | STC CSNI final report 22/9/95 |
| POW | programme of work | |
| PP | Presentation Protocol | |
| PPC | payment and progress committee | |
| PPC | petroleum planning committee | |
| PPCG | provisional policy coordination group | |
| PPLI | Precise Participant Location and Identifier | |
| PPM | Page per Minute | |
| PPM | Pulse Position Modulation | |
| PPP | point to point protocol | |
| PPS | precision and positioning system | |
| PPTC | point-to-point telegraph centre | |
| PRA | Primary Pate Access | |
| PRB | priority review board | |
| prENV | Draft European Prestandard | |
| PRF | pulse repetition frequency | RADAR |
| PRI | pulse recurrance interval | RADAR |
| PRM | Protocol Reference Model | |
| PRMD | Private Management Domains | |
| PROMES | project and resource management system | |
| PS | Peace Support | |
| PS | Presentation Service | |
| PSA | procedure de suppression automatique | |
| PSA | Provisional Site Acceptance | |
| PSAP | Presentation Service Access Point | |
| PSC | principal subordinate command | |
| PSDN | Packet Switched Data Network | |
| PSF | principal staff function | |
| PSF | production sharing formula | |
| PSG | principal subordinate group | |
| PSLO | posteal service liaison officer | |
| PSN | packet switched network | |
| PSN | Public Switched Network | |
| PSO | Peace Support Operation | |
| PSPDN | Packet Switched Public Data Network | |
| PSR | production sharing report | |
| PSTN | Public Switched Telephone Network | |
| PSVP | pilot secure voice project | |
| PTA | Principal Technical Adviser | |
| PTFS | precise time and frequency standard | |
| PTMP | project test management plan | |
| PTN | Public Telephone Network | |
| PTO | primary telecommunications operator | STC CSNI final report 22/9/95 |
| PTO | Private Telecommunications Operator | |
| PTO | public telecommunications operator | AC/317-N/798 |
| PTO | public telecommunications organization | |
| PTOC | Peacetime Operation Center | |
| PTOC | Peacetime Operation Center | |
| PTP | patch and test panel | |
| PTP | Point to Point | |
| PTT | post, telegraph and telephone | |
| PU | participating unit | |
| PUP | pick-up point | |
| PVC | Permanent Virtual Circuit | |
| PW | pulse width | RADAR |
| PWG | Permanent Working Group | |
| PWG | Planning Working Group | |
| PWHQ | Permanent War Headquarters | |
| PWHQ | primary war headquarters | |
| PWP | partnership work programme | |
| PIMS | PfP information managament system | US system |